Waste will become the major resource in the future circular economy. In particular, E-waste
is a major sector growing at an annual rate of about 2 million tonnes (Mt) with rising users of …

Since the birth of cyanidation, it has been dominant in the gold extraction industry. Recently,
with the increasing awareness of environmental hazards and potential risks posed by the …

The ongoing depletion of gold and silver-containing ore deposits demands a shift towards
the processing of more complex sources. Leaching of gold or silver from these sources …

The recovery of metals from waste electrical and electronic equipment has already been
highlighted as important due to the increased consumption worldwide with the …

Most waste electrical and electronic equipment (WEEE or E-waste) is recycle in the informal
sector, even though—many more sophisticated recycling technologies are available …

The potential effect of ultrasound was investigated, which could lead to cyanide loss or
decomposition during gold leaching. The variations of cyanide concentration during gold …

The geochemical features of the ores present in the oxidation zone of the gold-copper
Malmyzh mineral deposit are characterized. This deposit is located in the the Nanaian …

The aim of this study was to improve the dissolution of copper sulfide ore composed mainly
of chalcopyrite (1.21 wt%) and bornite (0.54 wt%) using a pretreatment before leaching. The …

The effect of jarosite generated from bio-oxidation on gold leaching in acidic thiourea
solution was studied, and the role of the oxalate additive was also investigated. The …

The recovery of Au and Ag from a roasted copper-rich pyritic refractory gold ore (78 g/t Au,
6.8 g/t Ag, 1.38% Cu and 3.09% Fe was investigated. Cyanide leaching and adsorption tests …